Spherical galaxy collisions: head-on encounters
A series of N-body simulations was performed in order to investigate head-on encounters between equal mass spherical galaxies of similar structure. Two different types of galaxy models were used in the experiments, differing mainly in the velocity distribution and central concentration: in the first...
Gespeichert in:
| Veröffentlicht in: | Astrophys. J.; (United States) 1989-01, Vol.336 (2), p.669-680 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 680 |
|---|---|
| container_issue | 2 |
| container_start_page | 669 |
| container_title | Astrophys. J.; (United States) |
| container_volume | 336 |
| creator | NAVARRO, J. F MOSCONI, M. B |
| description | A series of N-body simulations was performed in order to investigate head-on encounters between equal mass spherical galaxies of similar structure. Two different types of galaxy models were used in the experiments, differing mainly in the velocity distribution and central concentration: in the first kind of model, most of the particles moved predominantly along eccentric orbits, while in the second type most of the halo kinetic energy resided on the tangential velocity components of the particles and the core was rather isotropic. The fractional internal energy gain that a galaxy experiences after a head-on encounter was found to depend slightly on the type of orbits which predominate in the galaxy. The exchange of particles in a head-on collision is negligible. Tandem encounters are progressively more effective in producing escapers. The bounce induced by the overlapping at pericentric passage tends to erase the initial conditions of the galaxy models. 19 references. |
| doi_str_mv | 10.1086/167042 |
| format | Article |
| fullrecord | <record><control><sourceid>pascalfrancis_osti_</sourceid><recordid>TN_cdi_crossref_primary_10_1086_167042</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>7219695</sourcerecordid><originalsourceid>FETCH-LOGICAL-c241t-ad602626a5cd77ac6a3b354894b0288dcc3ddbc8ad23e218b78c31e668b4b0543</originalsourceid><addsrcrecordid>eNo90EtLxDAUBeAgCtZRf0MRcVcnryapOxl8wYALFdyV25uME6lJSSo4_94OFVeXCx8HziHknNFrRo1aMqWp5AekYLUwlRS1PiQFpVRWSuj3Y3KS8-f-5U1TkOXLsHXJI_TlB_Twsysx9r3PPoZ8U24d2CqG0gWM32F0KZ-Sow302Z393QV5u797XT1W6-eHp9XtukIu2ViBVZQrrqBGqzWgAtGJWppGdpQbYxGFtR0asFw4zkynDQrmlDLdJGopFuRizo159G1GPzrcYgzB4dgqbqaOekJXM8IUc05u0w7Jf0HatYy2-y3aeYsJXs5wgDxV3SQI6PO_1pw1qqnFLwRYW_Y</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Spherical galaxy collisions: head-on encounters</title><source>Alma/SFX Local Collection</source><creator>NAVARRO, J. F ; MOSCONI, M. B</creator><creatorcontrib>NAVARRO, J. F ; MOSCONI, M. B ; Observatorio Astronomico, Cordoba (Argentina)</creatorcontrib><description>A series of N-body simulations was performed in order to investigate head-on encounters between equal mass spherical galaxies of similar structure. Two different types of galaxy models were used in the experiments, differing mainly in the velocity distribution and central concentration: in the first kind of model, most of the particles moved predominantly along eccentric orbits, while in the second type most of the halo kinetic energy resided on the tangential velocity components of the particles and the core was rather isotropic. The fractional internal energy gain that a galaxy experiences after a head-on encounter was found to depend slightly on the type of orbits which predominate in the galaxy. The exchange of particles in a head-on collision is negligible. Tandem encounters are progressively more effective in producing escapers. The bounce induced by the overlapping at pericentric passage tends to erase the initial conditions of the galaxy models. 19 references.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1086/167042</identifier><identifier>CODEN: ASJOAB</identifier><language>eng</language><publisher>Chicago, IL: University of Chicago Press</publisher><subject>640105 - Astrophysics & Cosmology- Galaxies ; Astronomy ; BASIC INTERACTIONS ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; COLLISIONS ; CONFIGURATION ; Earth, ocean, space ; ENERGY ; Exact sciences and technology ; GALAXIES ; GRAVITATIONAL INTERACTIONS ; INTERACTIONS ; KINETIC ENERGY ; MANY-BODY PROBLEM ; MASS ; MATHEMATICAL MODELS ; MORPHOLOGY ; SIMULATION ; SPHERICAL CONFIGURATION ; Stellar dynamics and kinematics ; Stellar systems. Galactic and extragalactic objects and systems. The universe</subject><ispartof>Astrophys. J.; (United States), 1989-01, Vol.336 (2), p.669-680</ispartof><rights>1989 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c241t-ad602626a5cd77ac6a3b354894b0288dcc3ddbc8ad23e218b78c31e668b4b0543</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7219695$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/6286707$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>NAVARRO, J. F</creatorcontrib><creatorcontrib>MOSCONI, M. B</creatorcontrib><creatorcontrib>Observatorio Astronomico, Cordoba (Argentina)</creatorcontrib><title>Spherical galaxy collisions: head-on encounters</title><title>Astrophys. J.; (United States)</title><description>A series of N-body simulations was performed in order to investigate head-on encounters between equal mass spherical galaxies of similar structure. Two different types of galaxy models were used in the experiments, differing mainly in the velocity distribution and central concentration: in the first kind of model, most of the particles moved predominantly along eccentric orbits, while in the second type most of the halo kinetic energy resided on the tangential velocity components of the particles and the core was rather isotropic. The fractional internal energy gain that a galaxy experiences after a head-on encounter was found to depend slightly on the type of orbits which predominate in the galaxy. The exchange of particles in a head-on collision is negligible. Tandem encounters are progressively more effective in producing escapers. The bounce induced by the overlapping at pericentric passage tends to erase the initial conditions of the galaxy models. 19 references.</description><subject>640105 - Astrophysics & Cosmology- Galaxies</subject><subject>Astronomy</subject><subject>BASIC INTERACTIONS</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>COLLISIONS</subject><subject>CONFIGURATION</subject><subject>Earth, ocean, space</subject><subject>ENERGY</subject><subject>Exact sciences and technology</subject><subject>GALAXIES</subject><subject>GRAVITATIONAL INTERACTIONS</subject><subject>INTERACTIONS</subject><subject>KINETIC ENERGY</subject><subject>MANY-BODY PROBLEM</subject><subject>MASS</subject><subject>MATHEMATICAL MODELS</subject><subject>MORPHOLOGY</subject><subject>SIMULATION</subject><subject>SPHERICAL CONFIGURATION</subject><subject>Stellar dynamics and kinematics</subject><subject>Stellar systems. Galactic and extragalactic objects and systems. The universe</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><recordid>eNo90EtLxDAUBeAgCtZRf0MRcVcnryapOxl8wYALFdyV25uME6lJSSo4_94OFVeXCx8HziHknNFrRo1aMqWp5AekYLUwlRS1PiQFpVRWSuj3Y3KS8-f-5U1TkOXLsHXJI_TlB_Twsysx9r3PPoZ8U24d2CqG0gWM32F0KZ-Sow302Z393QV5u797XT1W6-eHp9XtukIu2ViBVZQrrqBGqzWgAtGJWppGdpQbYxGFtR0asFw4zkynDQrmlDLdJGopFuRizo159G1GPzrcYgzB4dgqbqaOekJXM8IUc05u0w7Jf0HatYy2-y3aeYsJXs5wgDxV3SQI6PO_1pw1qqnFLwRYW_Y</recordid><startdate>19890101</startdate><enddate>19890101</enddate><creator>NAVARRO, J. F</creator><creator>MOSCONI, M. B</creator><general>University of Chicago Press</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19890101</creationdate><title>Spherical galaxy collisions: head-on encounters</title><author>NAVARRO, J. F ; MOSCONI, M. B</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c241t-ad602626a5cd77ac6a3b354894b0288dcc3ddbc8ad23e218b78c31e668b4b0543</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1989</creationdate><topic>640105 - Astrophysics & Cosmology- Galaxies</topic><topic>Astronomy</topic><topic>BASIC INTERACTIONS</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>COLLISIONS</topic><topic>CONFIGURATION</topic><topic>Earth, ocean, space</topic><topic>ENERGY</topic><topic>Exact sciences and technology</topic><topic>GALAXIES</topic><topic>GRAVITATIONAL INTERACTIONS</topic><topic>INTERACTIONS</topic><topic>KINETIC ENERGY</topic><topic>MANY-BODY PROBLEM</topic><topic>MASS</topic><topic>MATHEMATICAL MODELS</topic><topic>MORPHOLOGY</topic><topic>SIMULATION</topic><topic>SPHERICAL CONFIGURATION</topic><topic>Stellar dynamics and kinematics</topic><topic>Stellar systems. Galactic and extragalactic objects and systems. The universe</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>NAVARRO, J. F</creatorcontrib><creatorcontrib>MOSCONI, M. B</creatorcontrib><creatorcontrib>Observatorio Astronomico, Cordoba (Argentina)</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Astrophys. J.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>NAVARRO, J. F</au><au>MOSCONI, M. B</au><aucorp>Observatorio Astronomico, Cordoba (Argentina)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spherical galaxy collisions: head-on encounters</atitle><jtitle>Astrophys. J.; (United States)</jtitle><date>1989-01-01</date><risdate>1989</risdate><volume>336</volume><issue>2</issue><spage>669</spage><epage>680</epage><pages>669-680</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>A series of N-body simulations was performed in order to investigate head-on encounters between equal mass spherical galaxies of similar structure. Two different types of galaxy models were used in the experiments, differing mainly in the velocity distribution and central concentration: in the first kind of model, most of the particles moved predominantly along eccentric orbits, while in the second type most of the halo kinetic energy resided on the tangential velocity components of the particles and the core was rather isotropic. The fractional internal energy gain that a galaxy experiences after a head-on encounter was found to depend slightly on the type of orbits which predominate in the galaxy. The exchange of particles in a head-on collision is negligible. Tandem encounters are progressively more effective in producing escapers. The bounce induced by the overlapping at pericentric passage tends to erase the initial conditions of the galaxy models. 19 references.</abstract><cop>Chicago, IL</cop><pub>University of Chicago Press</pub><doi>10.1086/167042</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-637X |
| ispartof | Astrophys. J.; (United States), 1989-01, Vol.336 (2), p.669-680 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_crossref_primary_10_1086_167042 |
| source | Alma/SFX Local Collection |
| subjects | 640105 - Astrophysics & Cosmology- Galaxies Astronomy BASIC INTERACTIONS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COLLISIONS CONFIGURATION Earth, ocean, space ENERGY Exact sciences and technology GALAXIES GRAVITATIONAL INTERACTIONS INTERACTIONS KINETIC ENERGY MANY-BODY PROBLEM MASS MATHEMATICAL MODELS MORPHOLOGY SIMULATION SPHERICAL CONFIGURATION Stellar dynamics and kinematics Stellar systems. Galactic and extragalactic objects and systems. The universe |
| title | Spherical galaxy collisions: head-on encounters |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-01T20%3A02%3A49IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-pascalfrancis_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Spherical%20galaxy%20collisions:%20head-on%20encounters&rft.jtitle=Astrophys.%20J.;%20(United%20States)&rft.au=NAVARRO,%20J.%20F&rft.aucorp=Observatorio%20Astronomico,%20Cordoba%20(Argentina)&rft.date=1989-01-01&rft.volume=336&rft.issue=2&rft.spage=669&rft.epage=680&rft.pages=669-680&rft.issn=0004-637X&rft.eissn=1538-4357&rft.coden=ASJOAB&rft_id=info:doi/10.1086/167042&rft_dat=%3Cpascalfrancis_osti_%3E7219695%3C/pascalfrancis_osti_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |